Safety attachment for boilers.



PATENTED JUNE 26, 1906.

' T. SMALL. SAFETY ATTACHMENT TOR BOILERS.

APPLICATION FILED FEB. 15, 1905.

617% Q//afo THOMAS SMALL, CF CAMDEN, NEW JERSEY.

SAFETY ATTACHMENT FOR BOILERS.

Specification of Letters Patent.

atented June 26, 1906.

Application filed February l5, 1905. Serial No. 245.695.

T0 @ZZ 10.77.0712, 71T' nutjl/ concern:

Be it known that I, THOMAS SMALL, a-citizen of the United States,residing in the city and county of Camden, State of New Jersey, haveinvented a new and useful Safety Attachment f or Boilers, of which thefollowing is a specication.

My invention consists of a regulator and a Y safety attachment for aboiler by which provision is made for preventing the water when low frombeing forced back by the steam into the main or source of supply andfrom heating the cold-water spigot, which is connected with thesupply-pipe of the boiler.

Attention is directed to the fact that the boiler is of the classintended more particularly 'for kitchen and bath-room purposes, and inthe present invention provision is made for utilizing the branch pipethat directs the hot water to such place of service as the means ofconnection of the members employed for effecting the result.v

Figure l represents a longitudinal section of a portion of a boilerhaving a regulator and safety attachment embodying my invention. Fig. 2represents a transverse section thereof on line :c zu, Fig. l. Fig. 3represents a section of a portion of another form of boiler and amodification of the regulator and attachment. Fig. 4 represents adetached view of the valve employed in open condition.

Similar letters of reference indicate corresponding parts in thefigures.

Referring to the drawings, A designates a portion of ahorizontally-arranged boiler, and B designates a nipple or tubularbranch connected therewith.

C designates a float within the boiler A, the same being connected withthe lever D, which partly enters the nipple B and is mounted thereon.Rising from said nipple is the tubular neck FJ, above which is thecasing F of the valve G, whose seat H is on said casing. It will benoticed that the branch B has an outlet independent of the valve-casingFfor the purpose of directing the hot water from the boiler A to a placeof service-such as a kitchen7 bath-room, &c.-and the top of said casinghas an opening forming an outlet which is uncovered when the valve Gleaves said seat H, so that steam from the boiler may escape from saidcasing, as will be hereinafter described. The stem J of said valvepasses through the casing F and has its lower end pivotally connectedwith the lever D. In the base of the casing F is the channel K,

from which extend the ports L, the latter leading from the bore M in theneck E to the interior of said casing F, it being noticed that the stemJ is somewhat of less diameter than that of the casing F, so that steammay pass through the latter to the valve thereof. Connected with thelower end of the bore M is the pipe N, which enters the boiler A and iscurved or deected upwardly and extends nearly to the upper wall of theboiler A, or at least above the level that the water may assume in saidboiler, it being noticed that the steam-space in the boiler is incommunication with the pipe N, and consequently with the bore M and thevalve-casing. It will be seen that under normal conditions the valve Gis held close on its seat by the action of the float C when the latteroccupies its highest position, the valve G being closed, whereby escapeof the steam is prevented.

As the water is removed from or becomes low in the boiler the float Csinks, whereby the pressure of steam exerted on the water is nowsufficient to return the water to the main or source of supply and heatthe usual coldwater-discharge spigot connected with the supply-pipe ofthe boiler, but these are immediately prevented, for as the lever D andstem J lower with said float the valve G is opened, (see Fig.4,) wherebyan outlet for steam is provided, the steam then entering the pipe N, thebore M, and the ports L, and so is directed into the casing F, fromwhence it escapes through the open valve through the outlet at the topof the casing, as hereinbefore referred to. Again, should the heat ofthe boiler be high and convert the main body of the water into steam,whereby the volume of the latter would be otherwise dangerous andpossibly cause explosion, the iioat again sinks, and so opens the valve,whereby the steam escapes and the boiler is relieved. As the boiler isresupplied with water the float C rises, and so closes the valve G,whereby the steam is prevented from escaping, while the ordinaryoperation ofthe boiler may continue.

In Fig. 3 I show the attachment as applied to a vertically-arranged orupright boiler, in which case the float Cl depends from thelever D andthe latter is connected with the stem J, the operation, however, beingin general respects the same as that in the embodiment shown in Fig. 1.In this construction the nipple B is connected with the boiler by theelbow or piece A', in which the adjacent end portion o f the lever D andupper end por- TOO ITO

tion of the supporting-arm C2 of the float C have their play, said pieceforming the communication between the boiler and nipple B.

Various changes may be made in the details of construction shown withoutdeparting from the general spirit of my invention, and I do not,therefore, desire to be limited in each case to the same.

Having thus described my invention, what I claim. as new, and desire tosecure by Letters Patent, is-

l. A hot-water boiler, a liot-water-co1ivey ing branch connectedtherewith and adapted to have attached to it, a pipe leading to a placeof service, a valve, a casing for said valve, Separate means in saidbranch forming a communication between the boiler and Said valve-casing,and means in the boiler connected with said valve automaticallyoperating to open the latter when the valve falls, said valve-casing andbranch being independent of each other.

2. A hot-water boiler, a hot-water-conveying branch connected therewithand adapted to have attached to it, a pipe leading to a place ofservice, a valve, a casing for said valve, separate means in said branchforming a communication between the boiler and Said valve-casing, afloat in Said boiler, and a lever carrying said float and entering saidbranch and being connected with Said valve, said valve-casing and branchbeing independent of each other.

3. In a boiler, an outlet therefor, a bore in said outlet independent oithe Same, a pipe connected with said bore and having its inlet end inSaid boiler, a valve, a communication between said bore and the casingof said valve, and means in the boiler connected with said valve adaptedto automatically open the latter when the water lowers.

4. In a boiler, an outlet, a tubular neck thereon, a bore in said outletin communication with Said neck, a valve, a port intermediate of saidneck andthe casing oi' said valve, an u] 3wardlydeilected pipe in theboiler connected with said bore, and means in the boiler connected withsaid valve automatically operating to open the latter when the waterfalls.

THOMAS SMALL., VVitneSses:

JOHN A. WIEDERSHEIM, XVM. CANER VVIEDERSEIM.

